Stubble burner



Patented Mar. 1, 1927.

UNITED STATES PATENT OFFICE. T

STUBBLE BURNER.

Application filed February This invention relates to improvements instubble burners and the objects of the invention are to provide amachine of this character, of light and eflicientconstruction, forburning stubble while also killing 111- sects and destroying weed seeds.

Still further objects are the provision of an improved machine of thischaracter in which the several parts will more satisfactorily perform.the various functions re quired of them and in which jets of flame fromopposite directions, covering the same ground, are provided.

With the foregoing and other objects in View, the invention consistsessentially in the novel construction and arrangement of parts asdescribed in the present specification and illustrated by theaccompanying drawings that form part of the same.

Referring now to the drawings, in which like characters of referenceindicate corresponding parts in each figure,

Figure 1 is an enlarged perspective view of the end of the machine.showing the burner pipes.

Figure 2 is a sectional detail of Figure 1.

Figure 3 is a section on the line 66 of Figure 2.

Figure 4 is an enlarged detail of the burner pipe supports.

Figure 5 is a detail of the hinge for the runners.

Figure 6 is an enlarged sectional detail of the counter-sunk aperturesin the burner The device is designed to form part of a weed burner ofthe type in which the burning elements are mounted on a suitable frameformed as a truck or having wheels by which it may be drawn over theground which frame carries the usual fuel supply tank and valvedconduits by which the burners are supplied with fuel from the said tank.The drawings show only the portion of the machine dealing with theburners and their connection to the frame.

Referring to the drawings, 21 indicates one of the branch supplypipesthrough which the fuel is supplied to transverse pipes 23 fromwhich feed pipes 25 lead to the burner pipes 27. The feed pipes 25 arepreferably provided with a plurality of needle point valves 26. Theburner pipes 27 extend parallel to each other and lie substantiallyparallel to the direction of motion of the weed burner. As illustrated,the

16, 1924. Serial No. 693,303.

upper portion of each portion is imperforate, extends rearwardly, isthen bent through 180, and extends forwardly, the lower forwardlyextending portion being provided with the burner orifices.

The valves 26 may be conveniently operated from a distance by means ofrods 28, one of which is provided for each valve.

Referring now to theburner pipes 27 and as illustrated in Figure 1,these are provided w-ithfia plurality of restricted holes 29 on eachside and in staggered relationship to one another, so that when theburner is in operation the ground is completely covered between thepipes With jets -,of flame.

If desired, instead of bored openings as here shown, suitable nozzlesmay be used, of any well known construction.

To ensure correct spacing and an even level, the burner pipes 27 aresupported in the apex of an angle iron 30, as illustrated in Figure 4,suspended from a suitable cross piece or brace 31, through which thedirect feed pipes 25 extend. As illustrated, there is a second of thesebraces, spaced from the brace 31 and parallel therewith, the whole beingsupported on runner members 32, in turn hingedly connected at 33 to arod 34. connected in any suitable manner to the frame of the machine andretained at an even distance therefrom by brackets 35.

To concentrate the flame from the burner pipes 27 and to prevent itbeing affected by wind, a sheet steel cover 36 is provided for eachsection of the burner system and is supported from the runners 32 byangle irons 37 and brackets 38. The front part of this cover ispreferably hinged at 39 to permit examination of the flames during theoperation of the machine.

The central part of the main frame may also be covered by sheet steel toform a platform for the purpose of assisting the operator to move abouton the machine, while being protected from the flames.

The runner member 32 and the burner elements 27 are designed to beraised and lowered by suitable means operable from adjacent to thedrivers seat, which means may include a chain device flexibly connectedat 4st to the angle iron 37.

Before commencing operations, the burner pipes 27 are heated to vaporizethe fuel and in this form it is burned, the heat generated during theburning being suflicient to con- 6 shown, or by any other suitablepressure means.

It should also be noted that half the pipe system may be operated at atime or both halves may be operated simultaneously.

The main frame may be constructed of angle iron or any suitablematerial, put to gether in any suitable way.

As many changes could be made in the above construction. and manyapparently widely different embodiments of my invention, within thescope of the claims, con structed without departing from the spirit orscope thereof, it is intendedthat all matter contained in theaccompanying specification and drawings shall be interpreted asillustrative and not in a limiting sense.

What I claim as my invention 5:

1. A device of the character described comprising a frame, a pluralityof spaced. parallel runners provided at the forward ends with upwardlyextending portions I hinged to said frame to provide for vertical pipessupported by said runners and cross bars, each pipe being bent intoU-form and arranged to provide a lower burner portion lying on one ofsaid runners and an upper retort portion passing through openings Iformed in said cross bars and lying directly above said burner portion,the latter being sealed at the end opposite that connected to the retortportion and beingprovided with outlet openings at each side locatedabove the underlying supporting runner,

2. A structure as recited in claim 1 including a bracket extendingacross and supported by the upwardly extending portions of the runnersand a cover member resting on the cross bars and hinged at one edge tosaid bracketQ t i 3. A structure as-recited "in claim .1 in which theoutlet openings oneach side of each burner are staggered with respect toeach other. i V i i In witness whereof I have hereuntoset my hand.

CHARLES CLARENCE HOWELL. i F

